If you are that tied to the Focusrite - understandably so, I think the most reasonable route for you is to go shopping for a music-only desktop, used, where you can install that Firewire card that you used to use.

Any other solution is going to be as kluged together as what you wrote above. Seems kind of an oxymoron to have a great multi-channel recording interface (the Focusrite mixer) sitting there as just a mixer and having to go analog out out of the thing to reconvert A/D into a different device.

I would think you could pick up a capable used desktop machine that will accept the firewire card, for less money than the channel count is going to cost you with a capable USB channel count interface.

Last edited by rockstar_not; 11/22/13 07:14 AM.